Answers

Alright, if you really want blunt bangs (straight across) but you're just worried about your forehead breaking out, then here are some tips that worked for me when I had blunt bangs :D!
1. Make sure that when you take a shower that you wash your hair really well! This will help to get all of the sicknasty grease out and all of the hair products that you may use.
2. Also be sure to wash your face really well (but gently) with soap and water; this will help to remove the dirt and oil from your pores which usually start the formation of pimples. (be sure to concentrate on that forehead area!)
3. After you're out of the shower; blow dry your hair!
4. when styling your hair, don't overload your hair, bangs especially, with "grease heavy" hair products because this causes the products from your bangs to "seep" down onto your forehead, mixing with the dirt and oil already on your skin. Therefore, forming pimples.